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onsemi BZX84C9V1LT3G
- Part No.:
- BZX84C9V1LT3G
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
BZX84C9V1LT3G.pdf
- Description:
- DIODE ZENER 9.1V 250MW SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:19,100
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Product details
Overview
BZX84C9V1LT3G from onsemi is a 9.1 V ±5% Zener diode in SOT-23 package, rated for 250 mW power dissipation on FR-5 board, with 15 Ω dynamic impedance at 5 mA test current and 0.5 μA reverse leakage at 7.3 V, used for voltage regulation in space-constrained portable electronics.
For engineers reviewing the BZX84C9V1LT3G datasheet, pinout, applications, or equivalent options, key selection criteria include nominal Zener voltage tolerance (±5%), thermal coefficient (+3.8 mV/°C), ESD rating (>16 kV HBM), and SOT-23 footprint compatibility with high-density PCB layouts.
Technical Context
This device operates as a two-terminal voltage reference using controlled reverse-biased avalanche breakdown. Its Zener voltage is specified at three test currents (1 mA, 5 mA, 20 mA), with dynamic impedance measured at each to characterize regulation stability under varying load conditions.
The SOT-23 package features a defined pinout (Pin 1: Anode, Pin 2: No Connection, Pin 3: Cathode) and supports automated assembly. Thermal resistance is 500 °C/W on FR-5 board, limiting continuous power handling without derating above 25°C ambient.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage | 9.1 V nominal, 8.5–9.6 V range at 5 mA - defines regulated output voltage under standard bias |
| Power Dissipation | 250 mW on FR-5 board at 25°C - sets maximum steady-state power before thermal derating applies |
| Zener Impedance | 15 Ω max at 5 mA - indicates low AC impedance for stable regulation against ripple and load transients |
| Reverse Leakage | 0.5 μA max at 7.3 V - ensures minimal quiescent current draw in standby or precision biasing circuits |
| Temperature Coefficient | +3.8 mV/°C - quantifies voltage drift per degree Celsius, critical for temperature-stable references |
| Capacitance | 130 pF at 0 V, 1 MHz - affects high-frequency noise filtering and signal integrity in RF-adjacent applications |
| ESD Rating | Class 3 (>16 kV HBM) - enables robust handling during board assembly and end-use in handheld devices |
Pinout & Package
SOT-23 (TO-236) surface-mount plastic package, 2.90 × 1.30 × 1.00 mm, void-free thermosetting case with corrosion-resistant finish, cathode indicated by band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 | Anode | Forward current entry point; connected to lower-potential node in Zener regulation configuration |
| Pin 2 | No Connection | Internally unconnected; must remain floating - no PCB trace or pad required |
| Pin 3 | Cathode | Reverse-bias terminal; connected to regulated output node and higher-potential supply rail |
Key Features
| Feature | Design Value |
|---|---|
| 250 mW FR-5 power rating | Enables use in compact battery-powered systems without external heatsinking |
| Tight thermal coefficient (+3.8 mV/°C) | Supports stable reference performance across −65°C to +150°C junction range |
| Class 3 ESD protection (>16 kV HBM) | Eliminates need for external ESD clamps in consumer handheld designs |
| Pb-Free and RoHS-compliant construction | Meets global environmental compliance requirements for industrial and automotive supply chains |
| Automated assembly-optimized SOT-23 footprint | Reduces placement cost and improves yield in high-volume SMT manufacturing |
Applications
| Portable Power Management | Signal Level Clamping |
|---|---|
|
Use Scenario: Regulating bias voltage for RF front-end ICs in Bluetooth headsets and wearables. IC Role / Device Role / Timing Role: Zener reference providing stable 9.1 V supply to LNA and mixer bias networks. Use Value: Maintains consistent gain and noise figure across battery discharge cycle due to tight 8.5–9.6 V tolerance and low 15 Ω impedance. |
Use Scenario: Limiting analog sensor output swing to protect ADC input stages in IoT nodes. IC Role / Device Role / Timing Role: Bidirectional clamp (anode-to-ground, cathode-to-signal) limiting positive excursions to 9.1 V + VF. Use Value: Prevents ADC saturation with <0.5 μA leakage at 7.3 V, minimizing impact on high-impedance sensor sources. |
| Industrial Sensor Excitation | Microcontroller Reset Supervision |
|
Use Scenario: Providing precise excitation voltage for 4–20 mA loop transmitter current sources. IC Role / Device Role / Timing Role: Shunt regulator establishing stable 9.1 V reference for op-amp-based current control. Use Value: Ensures <±0.5% full-scale error over temperature via +3.8 mV/°C TC and 250 mW thermal margin. |
Use Scenario: Monitoring 12 V supply rail to assert reset when voltage drops below safe operating threshold. IC Role / Device Role / Timing Role: Zener-based comparator input reference, triggering reset when divided rail falls below 9.1 V. Use Value: Delivers deterministic reset threshold with 130 pF capacitance minimizing false triggers from fast transients. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84C9V1LT1G | Same electrical specs, but supplied in 3,000-piece tape-and-reel vs. 10,000-piece for BZX84C9V1LT3G | Preferred for prototyping or low-volume production where smaller reels reduce inventory overhead | Select BZX84C9V1LT1G when reel size must match pick-and-place feeder constraints or order quantities are sub-10k |
| BZX84B9V1LT3G | Tighter ±2% tolerance (8.92–9.28 V) vs. ±5% for BZX84C9V1LT3G; otherwise identical package, power, and thermal specs | Required in precision analog circuits where reference stability dominates cost sensitivity | Choose BZX84B9V1LT3G only when design validation confirms ±2% Zener tolerance is necessary for system accuracy |
Compared with BZX84C9V1LT3G, BZX84C9V1LT1G offers identical performance in a smaller reel format, while BZX84B9V1LT3G trades wider tolerance for tighter voltage control-neither is pin-compatible drop-in replacement, but both share identical SOT-23 footprint and thermal behavior.
Availability
BZX84C9V1LT3G is available at Aetrix Electronics and suitable for portable power management, signal clamping, industrial sensor excitation, and microcontroller reset supervision requiring stable component supply and RoHS-compliant sourcing.
Supply support for BZX84C9V1LT3G includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
onsemi is a global semiconductor manufacturer specializing in energy-efficient power, analog, sensing, and connectivity solutions for automotive, industrial, cloud, and consumer markets.
BZX84C9V1LT3G belongs to the BZX84CxxxLTxG series of standard-tolerance Zener diodes designed for cost-sensitive, high-density voltage regulation in portable and embedded systems.
FAQ
What is the Zener voltage tolerance of BZX84C9V1LT3G?
The BZX84C9V1LT3G has a nominal Zener voltage of 9.1 V with a tolerance of ±5%, meaning its actual breakdown voltage falls between 8.5 V and 9.6 V when tested at 5 mA. This tolerance is confirmed in the Electrical Characteristics table on page 3 of the onsemi datasheet, under the BZX84CxxxLT1 series section. The BZX84C9V1LT3G maintains this specification across its qualified operating temperature range.
Does BZX84C9V1LT3G have a no-connect pin, and how should it be handled on the PCB?
Yes, BZX84C9V1LT3G has Pin 2 designated as "No Connection" per the mechanical outline (Style 8) and electrical characteristics table. This terminal is internally unconnected and must remain electrically floating - no PCB trace, pad, or solder joint should be assigned to it. Leaving Pin 2 unconnected avoids unintended parasitic paths and ensures correct Zener operation in the intended anode–cathode configuration.
What is the maximum power dissipation of BZX84C9V1LT3G on a standard FR-5 PCB?
The BZX84C9V1LT3G is rated for 250 mW total power dissipation on an FR-5 board at 25°C ambient temperature. Above 25°C, it must be derated at 2.0 mW/°C, reducing usable power linearly with rising ambient. This rating assumes standard JEDEC-defined board conditions (1.0 × 0.75 × 0.62 inches) and is explicitly stated in the Maximum Ratings table on page 2 of the official onsemi datasheet for BZX84C9V1LT3G.
Is BZX84C9V1LT3G suitable for automotive applications?
The BZX84C9V1LT3G itself is not AEC-Q101 qualified; however, the SZBZX84C9V1LT3G variant - which shares identical electrical and thermal specifications - is automotive-grade, AEC-Q101 qualified, and PPAP capable. For non-automotive industrial or consumer use, BZX84C9V1LT3G meets RoHS and Pb-Free requirements and delivers the same 9.1 V regulation performance in SOT-23 packaging.
What is the ESD rating of BZX84C9V1LT3G, and how is it verified?
BZX84C9V1LT3G has an ESD rating of Class 3 per the Human Body Model (HBM), exceeding 16 kV. This rating is confirmed in the Features section of the onsemi datasheet and validated through standardized JEDEC JS-001 testing. The robust ESD immunity allows direct handling and placement in high-volume automated assembly lines without additional protection circuitry in most portable electronics applications.
BZX84C9V1LT3G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- BZX84CxxxLT1G
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 9.1 V
- Tolerance:
- ±5%
- Power - Max:
- 250 mW
- Impedance (Max) (Zzt):
- 15 Ohms
- Current - Reverse Leakage @ Vr:
- 500 nA @ 6 V
- Voltage - Forward (Vf) (Max) @ If:
- 900 mV @ 10 mA
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3 (TO-236)
BZX84C9V1LT3G FAQ
1.How can I place an order for BZX84C9V1LT3G through Aetrix?
Please submit a Request for Quotation (RFQ) for BZX84C9V1LT3G on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for BZX84C9V1LT3G reliable?
The price and inventory of BZX84C9V1LT3G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BZX84C9V1LT3G is usually 5 days.
3.What payment methods are accepted for BZX84C9V1LT3G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BZX84C9V1LT3G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BZX84C9V1LT3G?
BZX84C9V1LT3G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BZX84C9V1LT3G order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for BZX84C9V1LT3G?
For technical support, including BZX84C9V1LT3G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BZX84C9V1LT3G requirements.
6.How does Aetrix verify that BZX84C9V1LT3G is sourced from the original manufacturer or authorized distributors?
All BZX84C9V1LT3G products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that BZX84C9V1LT3G meets industry standards.
7.What is the process for return or replacement of BZX84C9V1LT3G?
All BZX84C9V1LT3G units undergo pre-shipment inspection (PSI). If there is an issue with BZX84C9V1LT3G, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The BZX84C9V1LT3G part is unused and in its original packaging.
Return procedure for BZX84C9V1LT3G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BZX84C9V1LT3G Tags
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MMBZ5240B-7-F
Diodes Incorporated
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BZT52C5V6T-7
Diodes Incorporated
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MMSZ5231B-7-F
Diodes Incorporated
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BZT52C15-7-F
Diodes Incorporated
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BZX84C3V3LT1G
onsemi
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MMSZ5245BS-7-F
Diodes Incorporated
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MMSZ4682T1G
onsemi
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BZT52C15S-7-F
Diodes Incorporated
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MM5Z5V1ST1G
onsemi
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SMAJ4744A-TP
Micro Commercial Co
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BZT52C3V6LP-7
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SMAZ12-13-F
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